/**
 * _render-token.ts — plumbing for the API's server-issued render token.
 *
 * The Go API stamps every charged visual on a render-family route
 * (/human-design/chart + /visualization/bodygraph, /human-design/transit-chart,
 * /human-design/composite, /chinese/bazi, /vedic/chart) with a short-lived
 * token bound to the account and the chart-defining inputs
 * (auth/render_token.go). Presenting it on a re-render of the SAME chart —
 * the iframe's host light/dark reconciliation, a layout flip — makes that
 * re-render free (base charge and visual surcharge). Anything else is charged
 * normally, so passing a stale or foreign token is harmless.
 *
 * Flow: explore_* puts the token on the payload as `_render_token`; the iframe
 * hands it back as the `render_token` argument of its recalc / refetch call;
 * the tool sends it in the X-OE-Render-Token header.
 */
export declare const RENDER_TOKEN_HEADER = "X-OE-Render-Token";
/** Input-schema property for the app-only recalc args. Supplied by the embedded app, not the model. */
export declare const RENDER_TOKEN_PROPERTY: {
    readonly type: "string";
    readonly description: string;
};
/** Request headers presenting `token`, or undefined when there is none. */
export declare function renderTokenHeaders(token: unknown): Record<string, string> | undefined;
/**
 * The token the API injected on the root <svg> of a /visualization/bodygraph
 * response (a binary route, whose response headers the backend client does
 * not surface).
 */
export declare function renderTokenFromSvg(svg: string | null | undefined): string | undefined;
/** `visual.render_token` from an include_visual JSON response. */
export declare function renderTokenFromVisual(visual: unknown): string | undefined;
/** Copy of tool args with the per-call token removed (for `_refetch.args`). */
export declare function withoutRenderToken<T extends Record<string, unknown>>(args: T): T;